(b) Motion after trial where jury not required. After a trial not
triable of right by a jury, upon the motion of any party or on its own
initiative, the court may set aside its decision or any judgment entered
thereon. It may make new findings of fact or conclusions of law, with
or without taking additional testimony, render a new decision and direct
entry of judgment, or it may order a new trial of a cause of action or
separable issue.